Form clamp



Dec. 8, 1931. G. B. Bosco FORM CLAMP Fi1ed Dec. 19, 1950 Patented Dec.s, 1931 PATENT oFFlcE ,GEORGE B.*BOSCO, F CHICAGO, ILLINOIS Form CLAMPApplication filed December 19, 1930. Serial No. 503,371.

^ My present inventionrelates to improvements in form' clampsor-instrumentalities for drawing and holding forms for casting concretein position to receive the concrete. It is now, and has for sometimepast been,

regarded as desirable, and sometimes necessary, to cast about the metalelements of st-ructures having a metal; frame Work, a casing of concretefor heat insulation or tire l0 protection and other purposes.

' My present invention has special relation to improvements in theinstrumentalities lfor hangingforms from and about horizontally disposedelements suchas beams and girders and constitutes an extension andsimplification and improvement of the practices and devices illustratedin Figs. 2 and 5 of Patent No. 1,475,424 issued to me November 27, 1923,and in Figs. 1, 3 and 5 of Patent No. 1,515,- LO Y335 issued to meNovember 11, 1924.

In the first of the foregoing patents I illustrated hovv a form could behung from and Adrawn in position around a beam when the structure Wassuch as to permit conveni ient access to the bottom ofthe form `foroperating the facilities Which provide.

In the second j of the above mentioned patents I illustrated hovv a formcould be fhung from anddrawn about a beam when cess tothe top of thebeam thanto the bottom of thef'iorm Whichis more usually the case. TheTrinstrumentalities 'for securing' the above results shown intheaiorementioned patents comprise band iron fwithy instrumentalitiesfor exerting the necessary pull thereon and securing it in place afterit has been properly adjusted.A y n My present invention consists of animprovement in the facilities for permitting the band iron to be pulledin desired position and securing it in such position When attained. i

My present invention secures a considerr able simplification of suchinstrumentalities which attains a much desired economy and Which also ismuch easier and quicker put in position and use as it requires nothread.- ing of the band iron into the clamp, which "D is an annoyingand time consuming opera.-

-to it undesired and undesirable bends.

tion if the band iron 4be bent or distorted, and-it is Well nighimpossible to get a piece of band iron in position Without impartingovercoming the necessity of threading the wbandthrough apertures in theclamp the use of my invention secures a substantial saving in the timeof installation.

I have" attained the foregoing objects and results by means of thestructure illustrated in the accompanying drawings in Which- Fig. 1 is aschematic illustration in section 'of a form hung to and about an I-beamemploying my improved form clamp adapted to receive and hold both endsof the loop off band iron.

Fig. 2 is a in Fig. 1.

Fig. 3 is a view similar to that shown in Fig. 1 in which the clamp ismodified slight- 70 ly so as to hold but one end of the band iron. fFig. 4 is a plan oftheA structure shown in Fig. 3. i v

Fig. 5 is a perspective of the clamp shown in Figs. 1 and 2. 75

Fig. 6 is a perspective of the clamp shown in Figs. 3 and 4.

Similar reference characters refer to simiplan of the construction shownklar parts throughout the respective views. 30 'circumstances permitteda more ready ac- W hat is required is to dravvl a form in posil *tionandvsupport itWith respect tol the I- beam 10 so that it canl receiveand hold the concrete 11. I-beams employed in ordinarybuildingconstruction vary considerably in size, and what is important inthis considera- `tion the flanges in such I-beams vary in thickness fromone-half inch to twov inches. The variation may be greater than abovestated, but the above statement covers the usual and ordinary practice.90

. rspectto the bodyportion, pr-eferablyat 900 or more from theiroriginal position in the blank but not so fary as to bring the upwardlyextending ends of theseavings too'closeto-V gethertopreventvthev:layingorgentry of a c'strip vof band irontherebetween. Whenthe -body portion is ot alwidth to accommodate two strips. of band` ironside byiside the end `:120

of the body portion ottheelamp opposite to thatffrom which the wings o rdevelopments y 22 extendk is bent at right anglesdownwardl as at 23, orin the opposite direction to the bendingof the wings 22 for the purposeof abuttingthe edgeof a flange of the I-beam 10` 3,7.

the clampr as above describedv is placedon the top flange of the Ifbeambetween the upward-A ly.extending endsy 1.otthe'loop 20 ofband metalwith the Vdepending end 23 abutting :the edgeof the flange. The fendsrofthe 'loop f of band iron are then folded over the topof the beamfromjopposite directions and lentery between-the upstanding wings 22octthe clamp and arelocated-.between the wings side Y by side. The.Wings 22are then 'hammered down to engage the strips of band ir,on. l I

- The pulling-up tool' 24 is thenemployed for tightening the band ironuntil the formis fhung in proper relation tothe I-beam. The

grip ofthe turned down wings 22 on tlreband iron is sulcient toYsupport; the weight ofthe form :when empty, Ybut isviint 'suliicient toin. terefere withl the drawing of the band iron with the pulling-uptoohWhen the form has been drawingy into desired position; Y with-ieferen'ce to the'beanithe ends of theband ironare vbentbackandh'ammered domi tover the tops of thewings; 22, as .at` 2.5.vl/Vhenyso VVbent backend employing afclamp made from 12 gauge metal aforce nf 4G00 vpounds can be .exerted z-in'thexpullingaip of the band'iron and will be heldzby the clamp, which is ample `to support theweight of the ormfwhen with'concre'te fr .Y i .y i ltwill be noted thatthe endet Lthe band f iinnpassing down overy depending end 23 of theDclamp in association withvthe pull Bof the @end ofthe Aband ironextending in, the oppo- .site direction will permanently anddependablyfix the relationof the clamp vto the beam.

, The clamp designed for accommodating a YAYsingle width 4o'band iron,as shown in Figs. '53,4 :and 6, fdiiiers fonly, ;from the wideri'orm.assembling the v'form-:with the I -loeamV flange.

in width and in extending the depending end flange 23 'and'bending thesamebackwardly, asat 26, to'engage the under side of the flange of theI-beam, because,in this form, there is no length of band iron forholding the flange 23 to the beam. In the single form the flange 23 andturned back end 26 may be centrally corrugate'dfor y beaded, as at 27,to somewhat vstiften the structure `without additional expense. The'simplicity of the present clamp in connection with the ease ofassociating the band rir'ni with it secures substantial economies. Thepossibility of pulling upthe band iron with the pulling-up tool afterthe band ironis engaged by the vclamp assists in quickly securingthepfinal desired adjustment,and itwill further be noted that there is'noi dangerof shearing theband iron which must be guarded against` whenAawedge or wedge-like action is employed in linally securing the bandiron to the clamp. 1

Havmg `described' my invention what l .claim asy new and-desire to secureby Letters Patent is: y Y. K

- 1 A form clamp for use in association with band iron-and a pulling-uptool 'comprising a blank ofmetal, an integral'ilange depending from oneend thereot,.wings yextending from the sides of. said blank at the'endopposite said flange, said vwings being bent upwardly so as'to'reoeivestrips of band iron therebetween and adapted to, be flattened down uponthe included band iron, 'whereby said band iron maybe tightened afterassembly with Vsaid clamp through the instrumentalities of saidpulling-up "tool and` saidrl depending 2. A vfor-1inclamp for use inassociation with band iron and a pulling-up tool comprisino' a blank ofmetal, an integralilange 'depenV ing from one end thereof, wingsextending from the sides ofsaid'blank vat the end opposite said flange,saidwingsV being bent upwardlyso Yas to receivea portion of a loopofrband iron therebetweeen and adapted to be flattened down uponthe-included band iron,wherebysaid band ironmay be tightened afterassembly with said clamp-through vthe instrumentalities of saidv'pulling-up tool kand said depending; flange. Y

Geenen ini-Bosco 'i

